Carrier for pneumatic-service systems.



EATENTED AUG.15,'1905.

E. EURL. CARRIER EoR RNEUMATIG SERVICE SYSTEMS.

APPLIOATIOF FILED JAN. 4. 1904.

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NITED STATES PATENT OFFICE.

HARRY BURL, OF LONDON, ENGLAND, ASSIGNOR TO LAMSON CONSOLI- DATED STORESERVICE COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATIONOF NEW JERSEY.

CARRIER FOR PNEUMATIC-SERVICE SYSTEMS.

Specification of Letters Patent.

Patented Aug. 15, 1905.

Application iiled January 4. 1904. Serial No. 187.624..

To @ZZ whom it may concern.:

Be it known that I, HARRY BURL, a subject of His Majesty the King ofGreat Britain, re-

A siding at London, England, have invented a certain new and usefulImprovement in Carriers for Pneumatic-Service Systems, of which thefollowing is a specification.

This invention relates to improvements in carriers for pneumatic-servicesystems, the object of same being to provide means for securing theusual felt or like rings or blocks forming the packing or air-check ofthe carrier in such a manner that said rings or blocks maybe readilyreplaced when worn, the means employed also serving to secure togetherthe inner and outer metal tubes or casings of which the body of thecarrier is usually made.

In the accompanying drawings, Figure l is a part-sectional elevation ofa carrier of the open-ended type constructed in accordance with thisinvention. Fig. 2 is a similar view of a carrier of closed form. Fig. 3is a plan view'of a felt or other block forming an aircheclr. Fig. 4. isa plan view of one end of the closed carrier with the felt blockremoved. Fig. 5 is a plan view of one end of the inner tu be, and Fig. 6is a plan of the dished disk for carrying the screws at one end of theclosed form of carrier. 4

Referring to Fig. 1, 1 is the outer tube, and 2 the inner tube, havingat their open ends shoulders 3 and 4, respectively, between which islocated the packing-ring 5, of felt or analogous material. The outertube 1 is closed at 6, and the inner tube at that end is turned inwardto form a shoulder 7, which rests upon the closed end 6 of the tube l,and upon the inner face of said shoulder 7 rests a disk 8, which carriesscrews 9, said screws passing through the shoulder 7 of the inner tube 2.and projecting through the closed end b of the outer tube 1 andvthrough metal sleeves or distance-pieces 10, which may be loose or maybe screwed thereon or secured to the said outer end 6 by soldering orotherwise. The screws 9 and sleeves l0 pass into holes in the feltwasher-block 12, which acts both as a buii'er and air-check. The holesare countersunk, as shown at 13, on the outer surface for the receptionof nuts 14., adapted to be tight ened onto the said screws 9 to draw theparts closely together. The disk 8 may carry the usual spring 15, underwhich the written message issli'pped and held in position duringtransmission.

p In the closed form of carrier illustrated in the remaining figures ofthe drawings the outer tube 1 is arranged to rotate on the inner tube 2,and both are provided with side openings, respectively, 16 and 17,adapted to correspond or miss each other as the tubes are rotated toopen or close the aperture.

A stop is provided for the tubes, so that when rotated they cannot beturned much more than enough in one direction to open the carrier and inthe other direction to close the aperture. This stop is in the form ofan inwardlyprojecting shoulder 18, formed on the open end 19 of theinner tube 2, which is adapted to come in contact with two of the screws9, which hold the parts together, said screws being offset for thepurpose from the line of the other or others. A disk 20, which carriesthe screws 9, is provided at the same end and is dished, as shown, toform a distance-piece to prevent the two tubes 1 and 2 being too tightlyscrewed together. Each end of the carrier is in this case provided withthe felt blocks 12.

In carriers so constructed the felt blocks 12 may be readily removedwhen worn and renewed without taking the carrier to pieces by simplyTremoving the nuts 14. and drawing the blocks 12 off the screws 9 anddistance-pieces 10. To remove the felt ring 5 in the openended carriers,the outer tube, however, must be drawn off the inner to separate thegripping-shoulders 3 4 after the nuts 14 are removed.

1. In a carrier for pneumatic-despatch apparatus the combination withthe body thereof, of a block forming an air-check, screws attaching sameto said body, said block having' countersunk holes to receive the endsof said screws, distance-pieces located in said countersunl holes, andnuts seating upon said distance-pieces and engaging said screws to holdthe block to said body.

2. In a carrier for pneumatic-despatch apparatus the combination withinner and outer tubes forming the body thereof, of blocks formingair-checks, screws attaching same to said inner and outer tubesrespectively, said blocks having countersunk holes to receive the endsof said screws, distance-pieces located in said countersunk holes andsurrounding said screws, and nuts seating upon said distance-pieces andengaging said screws to draw said inner and outer tubes together andhold the blocks to sanne.

3. In a carrier for pneumatic-despatch apparatus the combination of aninner and an outer tube rotatable one upon the other and provided withside openings therein, means formed in one otsaid tubes and actinginconjunction with screw-heads for limiting the rotation ot said inner andouter tubes, and a block forming an ai r-check removably secured by thesame screws to the carrier-body.

4. In a carrier for pneumatic-despatch apparatus tlie combination of aninner and an outer tube rotatable one upon the other and provided withside openings, an inturned HARRY BU RL.

Witnesses STEPHEN HERWIG, PAUL KELLY.

